diff --git a/MailCore/Cache/MailboxManager.swift b/MailCore/Cache/MailboxManager.swift
index 661fc2bf7..efabebae5 100644
--- a/MailCore/Cache/MailboxManager.swift
+++ b/MailCore/Cache/MailboxManager.swift
@@ -72,7 +72,7 @@ public class MailboxManager: ObservableObject {
         let realmName = "\(mailbox.userId)-\(mailbox.mailboxId).realm"
         realmConfiguration = Realm.Configuration(
             fileURL: MailboxManager.constants.rootDocumentsURL.appendingPathComponent(realmName),
-            schemaVersion: 10,
+            schemaVersion: 11,
             deleteRealmIfMigrationNeeded: true,
             objectTypes: [
                 Folder.self,
diff --git a/MailCore/Models/Thread.swift b/MailCore/Models/Thread.swift
index 707627c1a..87623f3ca 100644
--- a/MailCore/Models/Thread.swift
+++ b/MailCore/Models/Thread.swift
@@ -43,7 +43,7 @@ public class Thread: Object, Decodable, Identifiable {
     @Persisted public var cc: List<Recipient>
     @Persisted public var bcc: List<Recipient>
     @Persisted public var subject: String?
-    @Persisted(indexed: true) public var date: Date
+    @Persisted public var date: Date
     @Persisted public var hasAttachments: Bool
     @Persisted public var hasSwissTransferAttachments: Bool
     @Persisted public var hasDrafts: Bool